It’s a fancy cheese grater, ultra coarse. I’ve had good luck with Microplane products. When I chanced upon a reference to this I thought I would grab one. I’ve been using a dime store rack grater that struggled with the block cheddar. This one works somewhat easier but it’s still work to get the cheese through it.I made a big cheese sauce with the sodium citrate and milk and ended up nearly emptying the crisper to make the cheesy veggie dish. It started with that head of cauliflower that was threatening to turn and went from there. Delicious with garlic toast.